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mv: split up uumain

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This commit is contained in:
shutefan 2017-10-05 22:25:18 +02:00
parent 618531b366
commit 14160cab86
1 changed files with 63 additions and 54 deletions
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117
src/mv/mv.rs
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@ -86,43 +86,8 @@ pub fn uumain(args: Vec<String>) -> i32 {
};
let usage = opts.usage("Move SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY.");
// This does not exactly match the GNU implementation:
// The GNU mv defaults to Force, but if more than one of the
// overwrite options are supplied, only the last takes effect.
// To default to no-clobber in that situation seems safer:
//
let overwrite_mode = if matches.opt_present("no-clobber") {
OverwriteMode::NoClobber
} else if matches.opt_present("interactive") {
OverwriteMode::Interactive
} else {
OverwriteMode::Force
};
let backup_mode = if matches.opt_present("b") {
BackupMode::SimpleBackup
} else if matches.opt_present("backup") {
match matches.opt_str("backup") {
None => BackupMode::SimpleBackup,
Some(mode) => {
match &mode[..] {
"simple" | "never" => BackupMode::SimpleBackup,
"numbered" | "t" => BackupMode::NumberedBackup,
"existing" | "nil" => BackupMode::ExistingBackup,
"none" | "off" => BackupMode::NoBackup,
x => {
show_error!("invalid argument ‘{}’ for ‘backup type’\n\
Try '{} --help' for more information.",
x,
NAME);
return 1;
}
}
}
}
} else {
BackupMode::NoBackup
};
let overwrite_mode = determine_overwrite_mode(&matches);
let backup_mode = determine_backup_mode(&matches);
if overwrite_mode == OverwriteMode::NoClobber && backup_mode != BackupMode::NoBackup {
show_error!("options --backup and --no-clobber are mutually exclusive\n\
@ -131,23 +96,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
return 1;
}
let backup_suffix = if matches.opt_present("suffix") {
match matches.opt_str("suffix") {
Some(x) => x,
None => {
show_error!("option '--suffix' requires an argument\n\
Try '{} --help' for more information.",
NAME);
return 1;
}
}
} else {
if let (Ok(s), BackupMode::SimpleBackup) = (env::var("SIMPLE_BACKUP_SUFFIX"), backup_mode) {
s
} else {
"~".to_owned()
}
};
let backup_suffix = determine_backup_suffix(backup_mode, &matches);
if matches.opt_present("T") && matches.opt_present("t") {
show_error!("cannot combine --target-directory (-t) and --no-target-directory (-T)");
@ -188,6 +137,66 @@ pub fn uumain(args: Vec<String>) -> i32 {
}
}
fn determine_overwrite_mode(matches: &getopts::Matches) -> OverwriteMode {
// This does not exactly match the GNU implementation:
// The GNU mv defaults to Force, but if more than one of the
// overwrite options are supplied, only the last takes effect.
// To default to no-clobber in that situation seems safer:
//
if matches.opt_present("no-clobber") {
OverwriteMode::NoClobber
} else if matches.opt_present("interactive") {
OverwriteMode::Interactive
} else {
OverwriteMode::Force
}
}
fn determine_backup_mode(matches: &getopts::Matches) -> BackupMode {
if matches.opt_present("b") {
BackupMode::SimpleBackup
} else if matches.opt_present("backup") {
match matches.opt_str("backup") {
None => BackupMode::SimpleBackup,
Some(mode) => {
match &mode[..] {
"simple" | "never" => BackupMode::SimpleBackup,
"numbered" | "t" => BackupMode::NumberedBackup,
"existing" | "nil" => BackupMode::ExistingBackup,
"none" | "off" => BackupMode::NoBackup,
x => {
crash!(1, "invalid argument ‘{}’ for ‘backup type’\n\
Try '{} --help' for more information.",
x,
NAME);
}
}
}
}
} else {
BackupMode::NoBackup
}
}
fn determine_backup_suffix(backup_mode: BackupMode, matches: &getopts::Matches) -> String {
if matches.opt_present("suffix") {
match matches.opt_str("suffix") {
Some(x) => x,
None => {
crash!(1, "option '--suffix' requires an argument\n\
Try '{} --help' for more information.",
NAME);
}
}
} else {
if let (Ok(s), BackupMode::SimpleBackup) = (env::var("SIMPLE_BACKUP_SUFFIX"), backup_mode) {
s
} else {
"~".to_owned()
}
}
}
fn help(usage: &str) {
println!("{0} {1}\n\n\
Usage: {0} SOURCE DEST\n \